The filter has been tested for at least 100 development cycles.įingerprints as evidence are extremely fragile. After processing, the fumes are safely purged from the chamber through the combination activated carbon/HEPA filtered exhaust. With the CApture, there is a gasket around the fuming tank to ensure that fumes stay in the fuming chamber during the fuming process. Both options leave the user in “duck and cover” mode when the fumes are to be released.
#FUMING FUMY FUMES PORTABLE#
Other portable systems use collapsible plastic enclosures that have seams from which fumes escape, or plastic bags that must be pulled over a chemical hot plate or a chemical reaction that cannot be controlled. This is smart evidence handling as well as good laboratory practice, and compatible with forensic laboratory accreditation requirements (if you happen to be in that line of work). In addition, a control slide can be used so each fuming event can be monitored and quality checked before post-processed evidence is handled. Water can be added prior to adding the glue to increase the overall humidity in the chamber. The CApture allows for the addition of humidity to the fuming chamber in the form of two heater receptacles: one is the drop pan for the superglue and the other is a water pan. If the humidity is too low, the fumes will form a visible residue as expected, but it will be ashy in texture and will wipe away from the evidence surface, taking with it the print that may have developed. Sufficient humidity in the chamber during fuming is the critical element of the process that fixes the developed prints. A perforated metal cover for the shelf can be employed for additional support as necessary. It comes with an integrated support rack that holds a metal-wire shelf and a rack-supported evidence hanger to free-hang evidence in the chamber. The interior measurements of the fuming chamber are approximately 10”W x 18.5”H x 8”D, which for field use is a convenient size. The CApture needs only a moderately flat surface for work place compatibility while fuming. The CApture assembles and can be ready for use in less than one minute. The CApture facilitates mobility and agility in approaching a crime scene. When the clear case fuming chamber is attached to the body, upright and ready for use, the operating dimensions increase to approximately 10.5”W x 19”H x 16”D. The carry-ready dimensions of the kit are approximately 10.5” W x 19”H x 10”D. It weighs less than 25 pounds and is equipped with a comfort grip handle for easy carrying.
A major advantage of this system is portability. The CApture works with standard fuming procedures as well as the microburst method employed by some agencies. The hot plate offers temperatures ranging from 120° to 350☏(50° to 177° C) and allows for adjustments in 1° increments. The CApture’s microprocessor-controlled hot plate is integrated into the body of the unit with an easy-to-use LCD display.
The CApture offers a great deal of control, which is an absolute necessity for processing evidence with CA fuming. The CApture by Labconco Corporation is a practical solution that, regardless of the user’s prior forensic training, is a device that easily enables proper CA fuming techniques at the crime scene. But one significant study (Perkins/Thomas, JFI 41 (3), 1991, 157-161) has shown that a greater percentage of latent prints are developed when appropriate evidence is processed with CA fuming prior to transport from the crime scene. The CApture quells the frustrations of days gone by for the use of cyanoacrylate ester fuming at crime scenes.Īnybody can pick up a brush and black powder and have a positive impact on the search for latent prints at a crime scene. Because the unit includes a filtered fume exhaust the fuming process can be stopped quickly preventing overdevelopment while protecting the user from exposure to CA fumes.
The CApture™ Portable Fuming System by Labconco Corporation is a new field device for cyanoacrylate fuming that is a stand-alone, portable unit that gives the user control of the hot plate temperature and humidity level in the fuming chamber. Rezzelle, Crime Scene Supervisor for the Johnson County (KS) Sheriff's Office CriminalisticsĬyanoacrylate ester (CA) fuming (superglue fuming) is a preferred method of processing non-porous items of evidence for latent prints, but the proper application of CA fuming at crime scenes has historically been problematic.Ĭurrent methods offer little or no operability in the following areas: an integrated means for controlling the fuming process, regulating heat and humidity, and dealing with the major personal safety hazard of releasing CA fumes directly into the user’s breathing zone.
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